Paxil to Paoxil CR

Hi all, a little background, I was down to 10 MG of Paxil with headaches and IBS was acting up bad, so I decided to go back to 20 MG and the headaches wouldn't go away, so I went back down to 10 MG and the headaches have subsided for the most part, but my IBS is acting up again.. The DR and I decided to head to Paxil CR at 12.5 MG.. Has anyone had any success with this?